same thing—some form of the moniker“high performance.”The Scientific Equipment and FurnitureAssociation (SEFA) has set a definition forhigh efficiency that any fume hood makingone of the aforementioned claims shouldmeet or exceed. According to SEFA, ahigh-efficiency fume hood must pass thetesting requirements described below.

The ASHRAE 110 test is a three-part
test to check the containment performance
of a fume hood. This test is comprised of
a face velocity profile, smoke visualization
test, and a tracer gas test using sulfur hexafluoride (SF6) and a manikin.

Per SEFA, the definition of an energy
efficient fume hood is as follows: “Low
Velocity Laboratory Fume Hoods are hood
designs that provide a reduction in the required exhaust air volume, when compared
to the volume required for the same size
fume hood to operate with a face velocity
of 100 fpm through a fully opened vertical
sash and provides containment levels equivalent or superior to ASHRAE 110 tracer gas
test ratings of 4.0 AM 0.05, and 4.0 AI/AU